CN214367454U

CN214367454U - Novel piston assembly

Info

Publication number: CN214367454U
Application number: CN202022975887.XU
Authority: CN
Inventors: 吴金钟
Original assignee: Quanzhou Bohan Machinery Co ltd
Current assignee: Quanzhou Bohan Machinery Co ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-10-08
Anticipated expiration: 2030-12-09

Abstract

The utility model relates to a simple structure, effectual novel piston assembly of shock attenuation, include the piston rod, locate the piston on the piston rod, the piston includes the piston body and locates the boss of piston body upper surface, the middle part of piston is equipped with a through-hole that supplies the piston rod to pass along its axial direction, the week side evenly distributed who just is located the through-hole on the piston has a plurality of axial passageway, communicate each axial passageway and external logical groove on the boss respectively, the upside of piston is equipped with and can be used to seal the valve block of axial passageway, the upside of valve block is equipped with the gasket, the last stopper that is equipped with of gasket, the downside threaded connection who is located the piston on the piston rod has lock nut.

Description

Novel piston assembly

Technical Field

The utility model relates to a bumper shock absorber especially relates to a novel piston assembly.

Background

The piston assembly of current bumper shock absorber mainly includes the piston rod and installs the piston on this piston rod, is equipped with a plurality of running through on this piston the axial passage of piston, the both ends of this piston are equipped with and seal up the last valve block of axial passage, the tip of piston rod is equipped with external screw thread portion, is equipped with adjusting nut on this external screw thread portion, the piston rod still is equipped with the spring that supports between valve block and adjusting nut outward. When the automobile shock absorber is used, the height of the spring is changed by adjusting the adjusting nut to change the restoring damping force, so that the bearing pressure is changed, the shock absorber can be adjusted according to different loads of automobiles, and the riding comfort and safety are changed. As in chinese patent application No.: 201220451448.1 discloses a piston assembly of a shock absorber, which comprises a piston rod and a piston arranged on the piston rod, the piston is provided with a plurality of axial channels penetrating through the piston, two ends of the piston are provided with valve plates capable of being sealed on the axial channels, the end part of the piston rod is provided with an external thread part, an adjusting nut is arranged on the external thread part, a spring is also arranged outside the piston rod, an adjusting piece is arranged outside the adjusting nut in a sliding way, the spring is supported between the inner end surface of the adjusting piece and the valve plate, the outer end surface of the adjusting piece is concavely provided with a positioning groove, the outer end of the adjusting nut is convexly provided with a positioning bulge, the positioning bulge is arranged in the positioning groove, a circle of convex ring which can extend out of the outer side of the positioning bulge is further arranged on the outer end face of the adjusting piece and positioned on the outer side of the positioning groove, and at least one pair of centrosymmetric locking grooves are formed in the convex ring. However, this piston assembly's structure is complicated, need be through the common compression stroke of adjusting nut, regulating part regulating spring to through spring compression valve block locking axial passage, damping oil is by the separation, when receiving the impact, needs to promote and promote the rebound valve compression spring, makes axial passage intercommunication, makes the impact force can not be better alleviate, and the shock attenuation effect is poor.

SUMMERY OF THE UTILITY MODEL

Therefore, to foretell problem, the utility model provides a simple structure, effectual novel piston assembly of shock attenuation.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a novel piston assembly, includes the piston rod, locates the piston on the piston rod, the piston includes the piston body and locates the boss of piston body upper surface, the middle part of piston is equipped with a through-hole that supplies the piston rod to pass along its axial direction, the week side evenly distributed who just is located the through-hole on the piston has a plurality of axial passageway, communicate each axial passageway and external logical groove on the boss respectively, the upside of piston is equipped with and is used for sealing the valve block of axial passageway, the upside of valve block is equipped with the gasket, be equipped with the stopper on the gasket, the downside threaded connection who is located the piston on the piston rod has lock nut.

Furthermore, the number of the axial channels is four.

Furthermore, an annular groove is formed in the circumferential outer surface surrounding the piston, and a sealing ring is sleeved in the annular groove.

Furthermore, the upper part of the limiting block is provided with an elastic anti-collision block.

Further, the stopper includes the first portion that supplies the elasticity gasket to lean on and the second portion that is set up by the lower surface downwardly extending of first portion, elasticity gasket and valve block are worn to locate by the second portion.

By adopting the technical scheme, the beneficial effects of the utility model are that: this novel piston assembly, through rotatory lock nut, thereby drive the piston, the valve block slides along the axial direction of piston rod, and then adjust elastic gasket's compression, thereby adjust damping oil and axial passage's damping size, and set up the boss on through the piston, and the boss sets up intercommunication axial passage and external logical groove, make the damping oil of piston upside and downside form the intercommunication state, when receiving compression impact force, damping oil can be through leading to the groove overflow, form the flow state fast, alleviate the impact force of first striking, improve the bradyseism effect, and this kind of simple structure, it is good to adjust the convenience, greatly reduced manufacturing cost under the condition of the bradyseism effect of increaseing.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention;

fig. 2 is an exploded view of an embodiment of the present invention;

fig. 3 is an exploded view of another embodiment of the present invention;

fig. 4 is a schematic perspective view of a piston according to an embodiment of the present invention.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings and detailed description.

The embodiment of the utility model provides a do:

referring to fig. 1, 2, 3 and 4, a novel piston assembly includes a hydraulic cylinder 1, an upper sealing cover 2 and a lower sealing cover 3 disposed at two ends of the hydraulic cylinder 1, and a piston rod 4 disposed in the hydraulic cylinder 1 and having one end passing through the upper sealing cover 2, the piston rod 4 is disposed inside the hydraulic cylinder 1 and is provided with a piston 5, the piston 5 includes a piston body 51 and a boss 52 disposed on an upper surface of the piston body 51, a through hole 15 for the piston rod 4 to pass through is disposed in a middle portion of the piston 5 along an axial direction thereof, four axial passages 6 are uniformly distributed on the piston 5 and on a peripheral side of the through hole 15, the boss 52 is respectively communicated with the axial passages 6 and an external through groove 7, an annular groove 8 is disposed on a peripheral outer surface surrounding the piston 5, a sealing ring 9 is sleeved in the annular groove 8, a valve plate 10 capable of sealing the axial passages 6 is disposed on an upper side of the piston 5, the upside of valve block 10 is equipped with elastic gasket 11, be equipped with stopper 12 on the elastic gasket 11, stopper 12 includes the first portion 121 that supplies elastic gasket 11 to support and the second portion 122 that sets up by the lower surface downwardly extending of first portion 121, elastic gasket 11 and valve block 10 are worn to locate by second portion 122, the upper portion of stopper 12 is equipped with elasticity anticollision piece 13, the downside threaded connection who lies in piston 5 on the piston rod 4 has lock nut 14.

The utility model discloses a working method is: this novel piston assembly, through rotatory lock nut 14, thereby drive piston 5, the valve block slides along piston rod 4's axial direction, and then adjust the compression of elastic gasket 11, thereby adjust damping oil and axial passage 6's damping size, and set up boss 52 on piston 5, and boss 52 sets up intercommunication axial passage 6 and external logical groove 7, make 5 upside of piston and downside damping oil form the intercommunication state, when receiving the compression impact force, damping oil can be through leading to groove 7 overflow, form the flow state fast, alleviate the impact force of first striking, improve the bradyseism effect, and this kind of simple structure, it is good to adjust the convenience, greatly reduced manufacturing cost under the condition of bradyseism effect of heightening.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A novel piston assembly is characterized in that: including the piston rod, locate the piston on the piston rod, the piston includes the piston body and locates the boss of piston body upper surface, the middle part of piston is equipped with a through-hole that supplies the piston rod to pass along its axial direction, week side evenly distributed that just is located the through-hole on the piston has a plurality of axial passage, communicate each axial passage and external logical groove on the boss respectively, the upside of piston is equipped with and is used for sealing the valve block of axial passage, the upside of valve block is equipped with the elastic gasket, be equipped with the stopper on the elastic gasket, the downside threaded connection who is located the piston on the piston rod has lock nut.

2. The novel piston assembly of claim 1 wherein: the number of the axial channels is four.

3. The novel piston assembly of claim 1 or 2, wherein: the piston is provided with a circular groove on the circumferential outer surface around the piston, and a sealing ring is sleeved in the circular groove.

4. The novel piston assembly of claim 3 wherein: the upper part of the limiting block is provided with an elastic anti-collision block.

5. The novel piston assembly of claim 4 wherein: the stopper includes the first portion that supplies the elasticity gasket to lean on and the second portion that sets up by the lower surface downwardly extending of first portion, elasticity gasket and valve block are worn to locate by the second portion.